Discover all Calibre features
Platform
Pull Request Reviews
Compare and see the performance impact of your team’s work without leaving GitHub.
Test Profiles
Change conditions that Calibre tests your Sites in—connection speed, devices, test location and more.
Performance Budgets
Track your progress and introduce accountability by setting budgets against metrics.
Single Page Tests
Quickly create and share one-off test results with no log-in required.
Insights Email Report
Receive comprehensive performance overviews directly to your inbox each week.
Google Lighthouse built-in
Leverage the power of a custom-built performance suite, including Google Lighthouse.
Core Web Vitals support
Track modern metrics that will have an impact on your search ranking: Largest Contentful Paint, Cumulative Layout Shift and Total Blocking Time.
Main Thread Execution Timeline
Easily identify tasks that are long-running or blocking the JavaScript main thread execution.
Third Party Tracking
Understand the impact of external scripts—how it affects your page size and execution time.
Pages Leaderboard
Find best or worst performing Pages and benchmark against your competitors.
Global testing infrastructure
Test your Sites across 14 global locations to discover where your customers’ experience suffers most.
Unlimited data retention
We offer a lifetime snapshot data retention for all account tiers.
Advanced test scheduling
Always be in control of how often your Sites should be tested.
Test variability prevention
Be confident in your metrics with an AI-powered test verification engine that quickly re-tests results when an anomaly is detected.
Unlimited Sites and Pages
Track unlimited Sites and Pages at no extra cost.
Metric charts
See historical performance metric data over up to 6 months.
Ad and Third Party Blocking
Block ads and third party resources to establish a performance baseline.
JavaScript timings
Find out the parse, compile and execution cost of internal and vendor scripts.
Testing authenticated pages
Access Pages requiring authentication through cookies, custom headers or form log-ins.
Site render timeline
Easily spot when and under which conditions rendering problems occur.
Fixed IP addresses
Use fixed IP addresses to ensure requests are securely coming from Calibre.
Request log
Dig into downloaded assets and learn how to optimise their delivery.
HAR files
Download HAR files to understand connectivity and transfer issues.
Automation
Command line interface
Automate your performance system with powerful, modern CLI tooling.
Node.js API
Use our npm package to leverage Calibre directly in Node.
Webhooks
Add webhooks to retrieve snapshot data securely through HTTP.
Deploy tracking
Find out which release affected performance, accessibility or SEO with deployment markers.
Notifications
Email alerts
Get timely notifications about your performance monitoring and data, from performance budgets to test failures.
Slack integration
Receive instant alerts about new snapshots or performance budgets being met or blown.
Integrations
Vercel
Use Pull Request Reviews without any additional work when deploying Jamstack applications and websites.
Netlify
Trigger Snapshots after a Netlify deploy and mark releases on your metric charts.
Geckoboard
Send metrics from Calibre to Geckoboard to visualise your performance KPIs in your office.
Security and privacy
Full encryption
We encrypt all of your data at rest in both our databases and file storage.
GDPR compliance
We comply with the General Data Protection Regulation (GDPR) to ensure you always have control over your data.
SSO (SAML)Enterprise
Add an extra layer of sign in security and faster onboarding for your organisation.